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WinFormsProject/WinFormsLibrary/CustomCheckedListBox.cs

@@ -11,6 +11,7 @@ using static System.Windows.Forms.VisualStyles.VisualStyleElement;
 
 namespace WinFormsLibrary
 {
+
     public partial class CustomCheckedListBox : UserControl
     {
         public CustomCheckedListBox()
@@ -18,42 +19,41 @@ namespace WinFormsLibrary
             InitializeComponent();
         }
 
-        //метод для очистки
         public void Clear()
         {
             checkedListBox.Items.Clear();
         }
 
-        //метод для заполнения
-        public void FillCheckedListBox(List<string> items)
+        public CheckedListBox.ObjectCollection Items
         {
-            checkedListBox.Items.Clear();
-            checkedListBox.Items.AddRange(items.ToArray());
+            get
+            {
+                return checkedListBox.Items;
+            }
         }
 
-        //публичное свойство
         public string Selected
         {
             get
             {        
-                if (checkedListBox.SelectedItems.Count == 0)
+                if (checkedListBox.SelectedItem != null)
+                {
+                    return checkedListBox.SelectedItem.ToString();
+                }
+                else
                 {
                     return "";
                 }
-                string result = "";
-                foreach (object itemChecked in checkedListBox.CheckedItems)
-                {
-                    result += itemChecked.ToString() + Environment.NewLine;
-                }
-                return result;
             }
             set
             {
-                if (checkedListBox.Items.Contains(value))
+                for (int i = 0; i < checkedListBox.Items.Count; ++i)
                 {
-                    checkedListBox.SelectedItem = value;
+                    if (checkedListBox.Items[i].ToString() == value)
+                    {
+                        checkedListBox.SetItemChecked(i, true);                        
+                    }
                 }
-
             }
         }
 

WinFormsProject/WinFormsLibrary/NumberTextBox.cs

@@ -14,7 +14,7 @@ namespace WinFormsLibrary
     {
         public int? maxValue = null;
         public int? minValue = null;
-        public bool error = false;
+        public string errorText = "";
 
         public NumberTextBox()
         {
@@ -44,25 +44,43 @@ namespace WinFormsLibrary
             }
         }
 
-        public decimal Value
+        public decimal? Value
         {
-            get { return numericUpDown.Value; }
+            get {
+                if (CheckRanges(numericUpDown.Value))
+                {
+                    return numericUpDown.Value;
+                }
+                else
+                {
+                    return null;
+                }
+            }
             set
+            {
+                if (CheckRanges(value))
+                {
+                    numericUpDown.Value = (decimal)value;
+                }
+            }
+        }
+
+        private bool CheckRanges(decimal? value) 
         {
             if (MinValue == null || MaxValue == null)
             {
-                    error = true;
-                    return;
+                errorText = "Ошибка, диапазоны не заданы.";
+                return false;
             }
 
             if (value < MinValue || value > MaxValue)
             {
-                    error = true;
-                    return;
+                errorText = "Ошибка, значение не входит в заданный диапазон.";
+                return false;
             }
 
-                numericUpDown.Value = value;
-            }
+            errorText = "Ошибок нет.";
+            return true;
         }
 
         public event EventHandler DateChanged